A chronometer, or chrono for short (also referred to as a clock), was a device that measured and kept linear time. They could be found included in most electrical devices, or stand alone versions on walls or desktops and inside starships or vehicles. In ancient times, they existed in the form of pendulum clocks.

Many beings would also carry personal versions for both practical and fashionable reasons: often wrist-worn, these were sometimes described as watches.

Chronos could often be set to follow more than one time standard. Military chronos worn by soldiers and officers were often tuned to local time, ships' time (in the case of naval officers and starship crewers) and Galactic Standard Time, which was based on the Coruscant day and hour.

Chronos were a popular target for low-level criminals trying to earn some easy credits. Chronos could be sold at pawn shops for around 60-1000 credits depending on the quality of it.

In his youth Jacen Solo was known for telling several jokes involving a broken chronometer.